Examples with BitmapImage uk.me.parabola.imgfmt.app.typ.BitmapImage used on opensource projects

Example 1 with BitmapImage

use of uk.me.parabola.imgfmt.app.typ.BitmapImage in project mkgmap by openstreetmap.

the class CommonSection method readImage.

/**
 * Read the bitmap part of a XPM image.
 *
 * In the TYP file, XPM is used when there is not really an image, so this is not
 * always called.
 *
 * Almost all of this routine is checking that the strings are valid. They have the
 * correct length, there are quotes at the beginning and end at that each pixel tag
 * is listed in the colours section.
 */
protected BitmapImage readImage(TokenScanner scanner, ColourInfo colourInfo) {
    StringBuffer sb = new StringBuffer();
    int width = colourInfo.getWidth();
    int height = colourInfo.getHeight();
    int cpp = colourInfo.getCharsPerPixel();
    for (int i = 0; i < height; i++) {
        String line = scanner.readLine();
        if (line.isEmpty())
            throw new SyntaxException(scanner, "Invalid blank line in bitmap.");
        if (line.charAt(0) != '"')
            throw new SyntaxException(scanner, "xpm bitmap line must start with a quote: " + line);
        if (line.length() < 1 + width * cpp)
            throw new SyntaxException(scanner, "short image line: " + line);
        line = line.substring(1, 1 + width * cpp);
        sb.append(line);
        // Do the syntax check, to avoid an error later when we don't have the line number any more
        for (int cidx = 0; cidx < width * cpp; cidx += cpp) {
            String tag = line.substring(cidx, cidx + cpp);
            try {
                colourInfo.getIndex(tag);
            } catch (Exception e) {
                throw new SyntaxException(scanner, String.format("Tag '%s' is not one of the defined colour pixels", tag));
            }
        }
    }
    if (sb.length() != width * height * cpp) {
        throw new SyntaxException(scanner, "Got " + sb.length() + " of image data, " + "expected " + width * height * cpp);
    }
    return new BitmapImage(colourInfo, sb.toString());
}